The nonlinear optical properties of composite material with gold/silver and silver/gold core-shell nanoparticles are researched in this paper.The results show that third order nonlinear polarizability can be enhanced by varying the core-shell structure,structural parameter and volume fraction of the particles.%研究了金/银和银/金核壳结构球形纳米颗粒复合体系的非线性光学性质.结果表明,可以通过改变颗粒的核壳结构组分、结构参数以及复合颗粒的体积分数等手段来获得有效三阶非线性极化率的增强.
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